18 hours ago8 minWhat Components are in a Forced Air Gas Furnace? What do they Do?In order to troubleshoot a gas furnace, the technician must have a thorough knowledge of each component that could be in the unit. Unders...
Sep 235 minTroubleshooting an HVAC Control Board? How?Diagnosing if a control board is bad on a furnace, air conditioner, or heat pump may seem difficult but here are some simple tips and pro...
Aug 194 minClogged Liquid Line Filter Drier? How can you tell if you have a clogged liquid line filter drier? If there is a noticeable temperature drop from one side of the filter dr...
Aug 61 minIs There an Easy Way to Tell if a Mini-Split Ductless Unit is Low on Refrigerant? (Quick Tip)Is there an easy way to tell if a mini-split ductless unit is low on refrigerant? Yes, if the Delta T is low and the system continues to ...
Aug 61 minWhy Do Some Evap Coils Leak While Others Do Not? (Quick Tip)Why do older coils seem to last a long time but ones that are only 10 or 15 years old leak? Energy transfer efficiency was not as much of...
Jul 2210 min40 Vacuum Tips for HVACR Technicians! Avoid Frustration!I put this list together to make sure that HVACR technicians don’t have to undergo the same frustrations, loss of time, and expenses that...
Jul 168 minChecking the Charge of Air Conditioners without Measuring Pressure!Can you check the charge on a system without checking pressure? Sure, remember that the only reason we check pressure is to convert it to...
Jun 291 minCan I measure a Negative Subcooling When Checking the Charge? (Quick Tip)The answer is no because the refrigerant rejects heat in the condenser so the pressure and temperature of the refrigerant should lower. T...
Jun 247 minR-22 and R-410A Operating Pressures, Charging and Recovery Setup!In this article, we will discuss an HVAC unit’s refrigerant pressure on both the high side and the low-pressure side while the system run...
Jun 116 minCharging a System in a Dry Climate? Consider a TXV and Accumulator!In a dry climate, certain considerations must be taken prior to installing or servicing air conditioning systems. A TXV metering device a...
May 288 minHow NOT to Check the Refrigerant Charge!There are many ways that technicians have tried to get around actually checking the charge of air conditioners and heat pumps with superh...
May 206 min10 Reasons Why a Mini-Split Ductless Flare May Leak Refrigerant!On a mini-split ductless system, two copper tubes are needed to transport the refrigerant. These copper tubes are referred to as the line...
May 611 minChecking the Charge of a Mini-Split Unit!A question that I get asked frequently is “Can I check the charge of a mini-split ductless unit with superheat and subcooling the same wa...
May 42 minIs a Triple Evacuation Necessary for a Deep Vacuum?Do you have to do a triple evacuation if you can achieve a deep vacuum by only doing a single evacuation? Remember that the target vacuum...
May 11 minMeasuring Negative Superheat on an Air Conditioner? (Quick Tips)Can you Measure Negative Superheat on an air conditioner when checking the charge? The Answer is NO! Time to check your gauges and temp s...
May 12 minHow to Tell if a TXV Has Lost Part of its Bulb Charge! (Quick Tip)How do you tell if a TXV lost part of its bulb charge? If you are measuring a correct/high subcooling along with a high superheat and a l...
Apr 281 minConnect Your Gauges Sooner Than Later! (Quick Tip)When checking the refrigerant charge of a running HVACR system, remember to attach your refrigerant hose to the vapor port right away. Do...
Apr 281 minFree Shrader Valve Refrigerant Leak Tester (Quick Tip)Make a Quick Free Refrigerant Leak Tester for the Schrader Valve (Valve Core) at the Access Port. Drill an 1/8” hole in the end of an ext...
Apr 281 minProtect Your Micron Gauge! (Quick Tip)Use an additional valve core removal tool in your vacuum setup to valve off and protect the vacuum gauge sensor from oil contamination wh...
Apr 229 minWhy Can’t You Just Measure Pressures to Check a Refrigerant Charge?Most technicians in the HVAC field know the normal range of operation for the low-pressure side of an air conditioning system. This tends...
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